CVE-2022-45047

A flaw was found in Apache MINA SSHD, when using Java deserialization to load a serialized java.security.PrivateKey. An attacker could benefit from unsafe deserialization by inserting unsecured data that may affect the application or server.

Mitigation

From the maintainer:

For Apache MINA SSHD <= 2.9.1, do not use org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider to generate and later load your server's host key. Use separately generated host key files, for instance in OpenSSH format, and load them via a org.apache.sshd.common.keyprovider.FileKeyPairProvider instead. Or use a custom implementation instead of
SimpleGeneratorHostKeyProvider that uses the OpenSSH format for storing and loading the host key (via classes OpenSSHKeyPairResourceWriter and OpenSSHKeyPairResourceParser).